Why is the phospholipid bilayer considered semipermeable?

Question

Quizplus · Accepted Answer

The phospholipid bilayer is considered semipermeable because it allows certain substances to pass through while acting as a barrier to others. This is due to the hydrophobic tails of the phospholipids, which prevent polar molecules from passing through, while allowing nonpolar molecules to pass. Additionally, the presence of proteins and other channels in the bilayer can regulate the movement of certain molecules.

Why Is the Phospholipid Bilayer Considered Semipermeable